18 Best PNG to PDF Converters in 2026 (Free and Paid)

PNG to PDF is the conversion you reach for when you have a screenshot or two — sometimes a stack of them — that need to ship as a real document. Screenshots of a Slack thread for a legal record. UI mockups for a client review. Diagrams for a report. The PNG keeps the sharp text and crisp edges; the PDF makes it a single, page-ordered, share-friendly file. This guide compares 18 PNG to PDF converters in 2026, with attention to the things that actually matter: multi-image combining, page sizing, output file size, and whether the tool preserves the screenshot crispness or quietly re-encodes it.

PNG → PDF is also a place where tool choice has a real impact on output file size — embedding a 5 MB PNG and embedding a re-encoded JPG of the same image produce wildly different PDFs. The next section covers when each is what you want.

The PNG-Specific Size Problem

PDF supports both lossless (PNG-like) and lossy (JPG-like) image streams. The choice has big consequences:

• Embed PNG losslessly: text and edges stay crisp. File size roughly equals the input PNG. For screenshots, charts, diagrams, this is what you want.
• Re-encode as JPG inside the PDF: file size drops dramatically (often 3–10x smaller). Text and edges get ringy, especially at lower qualities. For photos that happen to be PNG, this is fine; for screenshots, it is wrong.

The default behavior varies. ImageMagick re-encodes by default unless you pass -compress LZW. img2pdf embeds losslessly by default. Most web converters re-encode silently at a quality you do not get to choose. If the PNG was a screenshot and the output PDF looks worse than the source, the tool re-encoded it.

Quick Picks for PNG → PDF

• One quick PDF on a Mac: select PNGs in Finder → right-click → Quick Actions → Create PDF.
• One quick PDF on Windows: Photos → Print → Microsoft Print to PDF.
• Multi-page, screenshots, edges matter: img2pdf, How to Convert, or PDF24 — all preserve crisp PNG output.
• Smallest output file: ImageMagick with re-encode, but understand you are trading edge quality.
• Sensitive screenshots (work, finance, IDs): stay local. Skip web converters.

One-shot: PNG to PDF converter.

1. How to Convert (I built this one)

Drag PNGs in, reorder, choose page size, hit convert. Lossless PNG embedding by default — screenshots stay crisp. Optional re-encode for size when you have a photo-in-PNG. Local.

Pricing

• One-time purchase; free web demo for single-file conversions.

2. img2pdf — best command-line PNG-to-PDF

Small Python CLI tool. Embeds PNGs byte-for-byte into the PDF — no re-encoding, no quality loss. Output PDF is roughly the sum of the input PNG sizes.

img2pdf screenshot1.png screenshot2.png -o output.pdf

With explicit page size:

img2pdf --pagesize A4 *.png -o output.pdf

Fastest CLI tool for this conversion. The right pick for any pipeline where screenshot edge quality matters.

Pricing

• Free, open source.

3. macOS Finder Quick Action / Preview

Select PNGs in Finder, right-click → Quick Actions → Create PDF. Embeds losslessly. Or open the PNGs in Preview, drag the sidebar to reorder, File → Export as PDF.

Pricing

• Free with macOS.

4. Windows Photos → Print to PDF

Open PNGs in Photos, Print, pick “Microsoft Print to PDF.” Works for the basic case. No control over compression — the result is usually re-encoded as JPG inside the PDF, so screenshots get fuzzier. For crisp screenshots use PDF24 instead.

Pricing

• Free with Windows.

5. PDF24

Free Windows toolkit. The JPG-to-PDF and PNG-to-PDF tool preserves PNG losslessly by default. Multi-image combining, page size control, optional OCR. Best free Windows option.

Pricing

• Free for personal use.

6. ImageMagick

Basic — but with caveat that the default re-encodes PNGs as JPG inside the PDF, hurting screenshot quality:

magick *.png output.pdf

To preserve PNG losslessly inside the PDF (use this for screenshots):

magick *.png -compress LZW output.pdf

With explicit page size:

magick *.png -compress LZW -page Letter -gravity center output.pdf

Pricing

• Free, open source.

7. Adobe Acrobat

File → Create → Combine Files. Drag PNGs in, reorder, click Combine. Preserves PNG losslessly when configured. Optional OCR pass.

Pricing

• Subscription.

8. PDF Expert (Mac)

Mac-native, polished. Drag PNGs into a new PDF, save. Useful when you also need to annotate or sign afterwards.

Pricing

• Subscription or one-time depending on tier.

9. LibreOffice Draw

Insert PNG into Draw pages, File → Export as PDF. Fiddly compared to dedicated tools, but free and good for custom layouts.

Pricing

• Free, open source.

10. Foxit PDF Editor

Lighter Acrobat alternative. Create → From File → multiple PNGs. Optional OCR. Strong on Windows.

Pricing

• Subscription or perpetual.

11. Smallpdf

Web converter. Drop PNGs, reorder, set page size, download. Often re-encodes — screenshots lose edge crispness. Fine for non-sensitive photos.

Pricing

• Free with daily limits; paid above.

12. iLovePDF

Web JPG/PNG → PDF tool with multi-file upload, drag-to-reorder, and a generous free tier.

Pricing

• Free with limits; paid above.

13. CloudConvert

Web converter with detailed options including a lossless toggle for the PDF image streams. Most edge-quality-preserving web option.

Pricing

• Free tier; paid above.

14. Convertio

Web PNG → PDF with batch upload and reorder. Clean UI.

Pricing

• Free with caps; paid above.

15. FreeConvert

Web converter with quality settings.

Pricing

• Free with caps; paid above.

16. Nitro PDF

Adobe alternative for teams. PNG → PDF with team collaboration on top.

Pricing

• Subscription.

17. Microsoft Word

Insert PNGs into Word, Save As → PDF. Slow, but useful when you want captions, headers, or branding around each image.

Pricing

• Microsoft 365 or Office.

18. Pandoc (for screenshot-into-doc workflows)

Not a direct converter, but useful when you are building a PDF that contains PNG screenshots and other content. Write a Markdown file with image references, run Pandoc:

pandoc input.md -o output.pdf

Pandoc embeds PNGs losslessly via LaTeX. The right pick for documentation-as-code workflows.

Pricing

• Free, open source.

How to Choose

• Quick, casual: OS built-in.
• Edge quality matters (screenshots, charts): img2pdf, PDF24, or How to Convert. Avoid tools that silently re-encode.
• Many screenshots, real layout: Acrobat, PDF Expert, or Foxit.
• Smallest file: ImageMagick with default re-encode, accepting the edge quality tradeoff.
• Need OCR: Acrobat, PDF24, or Foxit.
• Sensitive content: stay local.
• Docs-as-code workflow: Pandoc.

Final Thoughts

PNG → PDF is mostly used for screenshots and diagrams, and the edge crispness of the source is the thing most worth preserving. Tools that quietly re-encode hurt the result. img2pdf and PDF24 are the strongest free choices for crisp screenshot PDFs; ImageMagick works if you pass the right flag. For sensitive content, keep it local.